Robertson had 36 goals, 54 assists, 34 PIMs and a +21 plus/minus through 68 games with Peterborough (OHL) in 2022-23 and has signed a three-year, entry-level contract with Seattle. The 20-year-old was the Kraken's 2022 fourth-round pick (123rd overall) and is expected to return to the OHL for his fourth season in Peterborough in 2023-24.